<template>
  <div class="app-container">
    课程列表
    <!--查询表单-->
    <el-form :inline="true" class="demo-form-inline">
      <el-form-item>
        <el-input v-model="courseQuery.title" placeholder="课程名称" />
      </el-form-item>

      <el-form-item>
        <el-select v-model="courseQuery.status" clearable placeholder="课程状态">
          <el-option value="Normal" label="已发布" />
          <el-option value="Draft" label="未发布" />
        </el-select>
      </el-form-item>
      <el-form-item>
        <el-input v-model="courseQuery.teacherId" placeholder="教师id" />
      </el-form-item>

      <el-button type="primary" icon="el-icon-search" @click="getList()">查询</el-button>
      <el-button type="default" @click="resetData()">清空</el-button>
    </el-form>

    <!-- 表格 -->
    <el-table :data="list" border fit highlight-current-row>
      <el-table-column label="序号" width="70" align="center">
        <template slot-scope="scope">{{ (page - 1) * limit + scope.$index + 1 }}</template>
      </el-table-column>

      <el-table-column prop="title" label="课程名称"  align="center" />

      <el-table-column label="课程状态" width="80" align="center">
        <template slot-scope="scope">{{ scope.row.status === "Normal" ? "已发布" : "未发布" }}</template>
      </el-table-column>

      <el-table-column prop="lessonNum" label="课时数" width="60" align="center" />

      <el-table-column prop="gmtCreate" label="添加时间" width="160" />

      <el-table-column prop="viewCount" label="浏览数量" width="60" align="center" />

      <el-table-column label="操作"  align="center">
        <template slot-scope="scope">
          <router-link :to="'/course/info/' + scope.row.id">
            <el-button type="primary" size="mini" icon="el-icon-edit">编辑课程基本信息</el-button>
          </router-link>
          <router-link :to="'/course/chapter/' + scope.row.id">
            <el-button type="primary" size="mini" icon="el-icon-edit">编辑课程大纲息</el-button>
          </router-link>
          <el-button
            type="danger"
            size="mini"
            icon="el-icon-delete"
            @click="removeDataById(scope.row.id)"
          >删除课程信息</el-button>
        </template>
      </el-table-column>
    </el-table>

    <!-- 分页 -->
    <el-pagination
      :current-page="page"
      :page-size="limit"
      :total="total"
      style="padding: 30px 0; text-align: center"
      layout="total, prev, pager, next, jumper"
      @current-change="getList"
    />
  </div>
</template>
<script>
//这里要引入你调用course.js的文件,.js可以省略
import course from "@/api/course/course";
export default {
  data() {
    return {
      list: null, //查询完之后接口返回集合
      page: 1, //定义当前页
      limit: 10, //定义每页记录数
      total: 0, //总记录数 初始值设置为0
      courseQuery: {} //条件封装对象
    };
  },
  created() {
    this.getList();
  },
  methods: {
    //分页查询课程列表
    getList(page = 1) {
      //传一个page可以切换分页，第1次查询第1页，以此类推
      this.page = page;
      course
        .getListCourse(this.page, this.limit, this.courseQuery)
        .then(response => {
          //response接口成功返回的数据
          this.list = response.data.rows; //给list赋值
          this.total = response.data.total; //给total赋值
        }) //请求成功
        .catch(error => {
          console.log(error);
        }); //请求失败
    },
    //清空查询框
    resetData() {
      //表单输入项清空
      this.courseQuery = {};
      //查询所有课程数据
      this.getList();
    },
    //2.删除课程
    removeDataById(id) {
      this.$confirm("此操作将永久删除讲师记录, 是否继续?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      })
        .then(() => {
          //点击确定，执行then方法
          //调用删除的方法
          course.deleteCourse(id).then(response => {
            //删除成功
            //提示信息
            this.$message({
              type: "success",
              message: "删除成功!"
            });
            //回到列表页面
            this.getList(this.page);
          });
        }) //点击取消，执行catch方法
        .catch(error => {});
    }
  }
};
</script>